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The rapid cloud computing growth has turned data center energy consumption into a global problem. At the same time, modern cloud providers operate multiple geographically-distributed data centers. Distributed data center infrastructure changes the rules of cloud control, as energy costs depend on current regional electricity prices and temperatures. Furthermore, to account for emerging technologies...
Cloud computing offers the elasticity features by dynamically resizing the infrastructure in response to changes in workload demands to meet performance guarantees and minimize costs. In the last decade, a large body of work has been done in the area of horizontal elasticity, while only few research efforts addressed vertical elasticity. This paper develops a vertical elasticity controller for cloud-based...
The paper presents results of the analysis of countries that experienced banking crises in the period 1976–2011. The analysed data are World Bank indicators in the periods before the onset of the crises. The work is done as part of the EU FP7 project “Forecasting Financial Crises”. For the analysis we have used the subgroup discovery methodology, which is especially useful when different subtypes...
Scientific applications have always been one of the major driving forces for the development and efficient utilization of large scale distributed systems — computational Grids represent one of the prominent examples. While these infrastructures, such as Grids or Clusters, are widely used for running most of the scientific applications, they still use bare physical machines with fixed configurations...
With significant advances in computing power during recent years, increasingly complex variants of the vehicle routing problem (VRP) with added constraints are coming into focus. VRP is a combination of the classical traveling salesman and bin packing problems, with many real world applications in various fields - from physical resource manipulation planning to virtual resource management in the ever...
With recent advances in graphical user interfaces, more and more tasks on computers have become easier to perform. Out of the belief that creating computer programs can also be one of them, visual programming languages (VPLs) have emerged. The goal of VPLs is to shift a part of work from the programmer to the IDE so that the programmer can focus more on algorithm logic than the syntax of the implementation...
Out of need for an efficient speech recognition system for the Croatian language, a model was built using the open source PocketSphinx toolkit. Firstly, a speech corpus of alphanumeric utterances was built for training. Secondly, the speech recognition model was built using PocketSphinx toolkit. Using a separate testing set, parameters for a good minimization of the word error rate were found. Useful...
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